ML17331A739

Proposed Tech Specs 3.6.4.3 & 4.6.4.3 & Table 3.6-1A Re Hydrogen Control Interim Distributed Ignition Sys Limiting Condition for Operation & Surveillance Requirements & Location of Igniter Groupings

ML17331A739
Person / Time
Site:	Cook
Issue date:	05/29/1981
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17331A738	List: ML17331A737 ML17331A739
References
NUDOCS 8106030207
Download: ML17331A739 (4)

Text

DONALD C. COOK NUCLEAR PLANT UNIT NOS. 1 AND 2 ATTACHMENT NO. 2 TO AEP:NRC:00500C

CONTAINMENT SYSTEMS HYDROGEN. CONTROL INTERIM DISTRIBUTED IGNITION SYSTEM LIMITING CONDITION FOR OPERATION 3.6.4.3. Two trains of the Distributed'Ignition System (DIS) shall be operable.

APPLICABILITY: Modes 1 and 2 ACTION With the DIS inoperable, restore the system to OPERABLE status within 7 days or be in HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

SURVEILLANCE RE UIREMENTS 4.6.4.3 Thl DIS shall be demonstrated OPERABLE:

At least once per refueling outage by energizing the supply.

breakers and verifying that no more than one igniter per group is not energized. Igniter*groups are shown in Table 3.6 - lA

b. Verifying by visual inspection that there is no loose debris in the vicinity of the igniters.

c~ Energizing each igniter and verifying.a surface temperature of ]5OOoF or greater by visual observation.'

Tabl e .3. 6-1A Distributed I nition S stem Location No. of I niters Per Train Per Grou f

l. U er Volume I niter Grou s

a. Phase 1 6

b. Phase 2

c. Phase 3 .5

2. Lower Volume I niter Grou s

a. Phase;1

b. Phase 2 5

c. Phase '3 D

r I

Su ested Addition to Bases Section 3/4.6.4 The Distributed Ignition System (DIS) is'esigned to provide additional hydrogen control capability in the unlikely event of a degraded core cooling event involving the generation of amounts of hydrogen in excess of that specified in TO CFR 50.44. The operability of the specified number of igniters will maintain an effective coverage throughout the con-tainment and will ensure combustion of lean hydrogen-air-steam mixtures in a controlled manner as the hydrogen is released; thereby precluding the potential accumulation of hydrogen and ignition at high concentration by a random ignition source.

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